I have 2 xm 222w amps leftover from a car I had. I need to power 2 x 200w 8 ohm Ev SX100 PA speakers. Since I have these amps lying around the house I thought I would convert them to be able to use them for these speakers. I have my audio source going to a 8 channel pro mixer which will go out to my amps then to the speakers. I am trying to cobble together a cheap system with what I have instead of spending 300 bucks for a rack mounted amp. Will they work? What Configurations should I use?
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200 watts is the maximum power handling capacity of the speakers. The amplifier should have a maximum power output of less than 200 watts (per channel) at 8 ohms to avoid over driving the speakers and possibly burning them out.
The wattage listed on the speakers is the peak wattage the speakers are rated to handle. You need amplifiers that do not exceed that maximum. A 50 watt amp would drive them fairly well but you would do better with a 100 to 200 watt amplifier. Note: the speaker rating is peak power handling. Amplifiers these days are usually rated at peak output too but sometimes (old or very high quality) amplifiers are rated at sustained power (RMS). If you are working with one of these amplifiers you will need an amplifier with a lower rating. Also make sure the amplifier is designed to run the same load as the speakers. This is usually either 8 ohm or 4 ohm. Make sure the speakers and amplifier are rated the same.
150 watts should be easily handled by four Peavey speakers in the connection you described.. If the Peavey's are 8 ohms, then your total load was 8 ohms for the series/parallel arrangement which is well within the 2 ohm drive capability of the Crate according to specs.
I question if you really mean the speakers were in series? This requires a special cable to do this. Now if you mean they were "daisy chained" like the amp went to one speaker and another cable connected that speaker to another, then you REALLY had ALL speakers in parallel electrically which would be at the 2 ohm low limit of the amp... In either case, with only 1/4 of the 150 Watts to each, the speakers should NOT have been damaged. The amp MAY have been damaged. Try each speaker individually at a REASONABLE level to test.
If you plug into the effects loop out jack,OFTEN the connection to the internal power amp is broken so you might have to arrange a special cable as a wye to go back into the power amp as well as your external amp. In any case pwere ALL interconnected amps, etc from the same power source/receptacle for system safety.
Your amp is a four channel so you have 4 sets of speaker outputs. to bridge this amp to 2 channels is pretty simple, all your have to do is when connecting your speakers instead of using both +, and - from the same channel, use the + from the one channel, and the - from the adjacent channel. Do this for both speakers, if you'll notice you now have 2 empty - terminals and 2 empty + terminals, if so you did it right... Hope this helps, enjoy your amp.
If you had 4 single voice coil speakers you can create either of those 2 ohm or 4 ohm setups. If you run 2 of them in parallel you will get the 4 ohms. If you run 4 of them in parallel you will get the 2 ohms. In parallel I mean that you connect the positives together and run them to the positive on the amp and the connect the negatives together and run them to the negative on the amp. Let me know if you need more help. Good Luck.
wire size depends on source, not load capability. your amp can provide 500 watts, so gage should be about 8, provided your speakers are 2 ohms each... you can measure them with ohmmeter. If you have 4 or 8 ohm speakers, you should get impedance matching transformers. Also, you should use a supply capacitor on power feed to amp of about 10 Farads...these are large and not cheap, but they provide "backup" power for heavy bass loads.